11. Most Unix programs, and in particular all of the Usenet software, were distributed in source code form . 12. Turbo-Basic XL was a late entry to this list, first published in December 1985 in source code form . 13. PRO claims that since these codes form part of US or state law they are not eligible for copyright. 14. CP / CMS was available to IBM customers from 1968 to early 1970s, in source code form without support. 15. JSwat is licensed under the Common Development and Distribution License and is freely available in both binary and source code form . 16. Another major design requirement for an AST is that it should be possible to unparse an AST into source code form . 17. In cryptography, the "'S-1 block cipher "'was a block cipher posted in source code form on Usenet on 11 August 1995. 18. This is true for many web applications, which must be in source code form when being run by a web server. 19. The original railway vehicle owner's code forms part of the vehicle number on the side of a railway coach or wagon. 20. GeoFRED is a data-mapping tool that displays FRED data series in color-coded form on the state, metropolitan statistical areas and county levels.